I have 2 of these for my Broil king gasser (one for round grates and one for the V shaped grates) and I love them. They end up getting to the point that they will be in contact with both the sides and the top, once they get worn in a little. The key to forming the grooves is the hotter , the better. You never have to worry about wires and I believe they are "gentler" on the surface of your grates.

There are 3 or 4 sizes/styles available. I also got mine from amazon. These things will last a very long time. If they get worn to a point that you don't like, you could cut off the end, taper it, and start over.